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UNITE STATE PATENT Fries.

SAMUEL WV. MARTIN, OF SPRINGFIELD, OHIO, ASSIGNOR TO MAST, FOOS & Y 00.,OF SAME PLACE.

PUMP.

SPECIFICATION-forming part ofLetters Patent No. 354,920,dated December28, 1886.

Application filed October 4, 1856. Serial No. 215,250. (No modeLl T allwhom it may concern:

Be it known that I, SAMUEL W. MARTIN, a

citizen ofthe United States, residing at Springfield, in the county ofClark and State of Ohio,

have invented certain new and useful Improvements in Pumps, of which thefollowing is a specification, reference being had therein to theaccompanying drawings.

This invention relates to improvements in double-acting force-pumps; andthe invention consists, essentially, in combining a two-part orseparable head, which receives supportfrom the well-platform, withsupporting-pipes, one of which acts also as an air-chamber, and the r 5other of which acts also as a dischargeconduit, with a piston orpiston-rod constructed to act upon the water, and with a barrel havingthe necessary adjuncts to eoact with the piston or pistoirrodto form aforce-pump, and a cap by which the pipes and barrel are connectedtogether.

Before entering into a detail description of myinvention it is proper toobserve that in the character of pumps to which this invention 2 5particularly relates there are two special classes of double-actingforce-pumps. One of these classes is composed of those pumps in whichthere are two cylinders of unequal diameter, one placed within theother, and in conjunction with which there is a piston-rod having twopistons, one piston for each cylinder. The primary function of thesmaller cylinder and its piston is to create a partial vacuum or space,into which water will accumulate when the handle makes its downwardstroke, and which will displace that accumulated water on its upwardstroke. Theother class is composed of one cylinder and a piston-rodconstructed at the part within the upper portion of the cylinder, so asto form a piston, as by being enlarged, and having, besides, a plungerat its lower end, which acts in contact with the cylinder. The result increating the space and in displacing the accumulated water is the same,5 however, in either case.

Inusing theterm piston-rod inthis specification and in the claims whichfollow it will be understood to mean either a piston-rod having oneplunger at its lower end, and enlarged 50 near the upper end of thecylinder, or to mean a piston-rod having two plungers, except ininstances where the piston-rod is specifically stated to have twoplungers In the accompanying drawings, forming a part of thisspecification, and on which like reference-letters indicatecorresponding features, Figure 1 represents a vertical sectional view ofmy improved pump; Fig. 2, alike View of the upper portion of the pump ona larger scale; Fig. 3, a horizontal sectional View of the head on theline .rxof Fig. 2, and Fig. 4 a sec tional view of the cylinder and theform of piston having an enlarged portion.

In the drawings, A designates the cylinder or barrel, constructed oftubular form and of 6 the same size from end to end. The lower end issupplied with the usual suction-pipe (not shown) and the upper end withcap B, which screws into the barrel or outer cylinder, and which has atubular extension, 0, thatconnects, as by a screwthread, with the barrelor inner cylinder, D, and supports the same. The cap is further providedwith vertical openings, into which the pipes E and F are respectivelysecured. The tubular extension 0 forms an opening through which thepiston or piston-rod G passes on its way into the barrel.

The structure so far described is suspended from above, and as in deepwells the pipes and the piston or piston-rod must be of considerablelength, thereby rendering the parts liable to sway, it becomes necessaryto hold the upper ends of the pipes firmly and by as long a hearing orcontact with the head as practicable. This is done successfully by thehead 8 indicated by the letter G. This head is constructed of two partsdivided vertically and held strongly together by the bolts H, which passthrough them. The parts are hollow, and eachis provided with an interiorflange, I, near the bottom, and a like flange, J, near or at'the top,and each flange or hearing is constructed with semicircular or similarrecesses, K K and L. When the parts are secured together, these recessesregister, and those designated K K encircle and tightly bind and securethe pipes E and F, while those designated L afford a passage for thefree vertical movement of the'piston or piston-rod, which passes on up,and is connected with an operating- I90 handle, M, fulcrumed in thevertical extension N of the head.

The pipe F is closed at its upper end, as seen in Fig. 2, and thus formsan air-chamber, as well as a supporting-pipe, while the pipe E has aspout at its upper end, and thus forms a dischargepipe, as well as asupporting-pipe.

Each part of the head is constructed in openwork for admitting air tothe interior and beneath the platform for the purpose of ventilation..The two parts of the head admit'of the pipes and piston-rod beingeasily enveloped, even though the spout and the handle are in place, andof the pipes. being firmly clamped and held, while at their lower endsthey are secured to the barrel by the cap. Thus the structure is cheaplyand strongly united together, and still the leading ideas of theinvention preserved-namely, the barrel and the supporting-pipesconnected by a cap, the piston-rod passed through the cap and the pipesheld firmly, and an elongated head at the top of the well, and all thiswithout increasing the lateral dimensions.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. In a pump, the combination, with a twopart vertically-divided headconstructed to rest upon the platform and provided with interiorclamping-bearings and with central openings, and devices to secure theparts of the head together, of supporting-pipes fitted to the saidbearings of the head and clamped and held thereby, the cap secured tothe lower ends of said pipes andhaving a piston-rod other adischarge-conduit, and a cap secured to said pipes and having a. centralopening, said cap forming a support for the lower part'of the pump inconnection with said pipes.

3. In a pump, the combination, with a vertically-divided headconstructed to rest upon the platform and having upper and lowerinterior hearings or flanges and central openings, and devices to securethe parts of the head together, of two supporting-pipes placed side byside and clamped between the flanges ot' the head, one forming anair-chamber and the other a discharge-conduit, a cap secured to saidpipes and having a central opening, and a tubular extension,apump-barrel also secured to the cap, and an inner cylinder secured tothe extension, and a piston-rod having two plungers, one for eachcylinder, and passing through the cap and the said central openings inthe head.

In testimony whereof I alfix my signaturein presence of two witnesses.

SAMUEL WV. MARTIN.

Witnesses:

WILBER GoLvIN, METTA COLVIN.

